<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			
		      $a = -100;
		
		      $b = 50;
		
		      document.write($a++ + --$b);
			  
		 </script>
	</body>
</html>